York S1-7680-3591 Limit Switch

The York S1-7680-3591 Limit Switch is a critical safety component designed for high-limit thermal protection in residential heating systems. As a professional-grade L155-20F auto limit switch, this unit is calibrated to open the electrical circuit at 155°F and features an automatic reset with a 20-degree differential, closing back at 135°F. This specific model serves as the factory-authorized successor to the York 300609025, ensuring seamless backwards compatibility and physical fitment during field repairs. For contractors asking how to replace York furnace limit switch components, this OEM part provides the exact electrical specifications required to maintain system safety. When verifying the cut-out temperature for York S1-7680-3591, technicians can rely on its precise bimetal disc for repeatable performance. Integrating a genuine HVAC furnace limit control is essential for preventing heat exchanger overheating. If you are searching for where to find York 300609025 replacement parts, this furnace high limit switch is the designated technical update for modern York, Coleman, and Luxaire air handlers and furnaces.

Key Benefits

• Direct OEM Replacement: Engineered as the official update for the legacy 300609025 part number, ensuring total compatibility.
• Automatic Reset Logic: Features a calibrated 155°F open point and 135°F close point to manage system cycling without manual intervention.
• Critical Safety Protection: Provides reliable circuit interruption to prevent the furnace from operating in hazardous over-temperature conditions.

Common Questions

Will this switch fit my older York furnace?
The S1-7680-3591 is the direct technical replacement for part number 300609025. If your current switch uses the 155-20F temperature rating, this is the correct drop-in component.

Is this a manual or automatic reset switch?
This is an automatic reset switch. It does not have a red button and will restore the circuit once the temperature falls below the 135°F reset threshold.

Why does my limit switch keep tripping?
While the switch may be failing, frequent tripping often indicates restricted airflow, such as a dirty filter, blocked return, or a failing blower motor that causes the heat exchanger to exceed the 155°F limit.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.